/**
 * Copyright 2011-2011 - Members of the Chaupal Community
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */


package net.chaupal.API.Boundary;

/**
 * Types of boundaries between communication devices.
 */
public enum BoundaryType {
    
    /**
     * Routers are devices organising the traffic flow on the Internet.
     */
    ROUTER,
    
    /**
     * Network Address Translators are implementing a technology enabling the
     * usage of a single IPv4 adress by multiple devices to communicate on the 
     * Internet.
     */
    NAT,
    
    /**
     * A firewall is a hardware or software feature filtering or restricting
     * communication on port numbers.
     */
    FIREWALL, 
    
    /**
     * A proxy is a device enabling and/or controlling access to the Internet
     * for other devices.
     */
    PROXY;
    
}
